MAX1516 Datasheet, PDF (8/26 Pages) Maxim Integrated Products – TFT-LCD DC-DC Converters with Operational Amplifiers

TFT-LCD DC-DC Converters with
Operational Amplifiers
Typical Operating Characteristics (continued)
(Circuit of Figure 1. V_IN = 5V, V_MAIN = 13V, V_GON = 24V, V_GOFF = -8V, V_OUT1 = V_OUT2 = V_OUT3 = V_OUT4 = V_OUT5 = 6.5V, T_A = +25°C
unless otherwise noted.)
TIMER DELAY LATCH
RESPONSE TO OVERLOAD
MAX1516 toc06
A
0V
B
55ms
0A
10ms/div
A: V_MAIN, 5V/div
B: INDUCTOR CURRENT, 1A/div
REF VOLTAGE LOAD REGULATION
1.253
1.252
1.251
1.250
1.249
1.248
1.247
0
10
20
30
40
50
LOAD CURRENT (µA)
GATE-ON REGULATOR LINE REGULATION
0.2
0
-0.2
-0.4
-0.6
-0.8
V_GON = 23.5V
I_GON = 20mA
-1.0
23 24 25 26 27 28 29 30
INPUT VOLTAGE (V)
GATE-ON REGULATOR LOAD REGULATION
0
-0.05
-0.10
-0.15
-0.20
-0.25
-0.30
0
5
10
15
20
LOAD CURRENT (mA)
GATE-OFF REGULATOR LINE REGULATION
1.00
V_GOFF = -8V
I_GOFF = 50mA
0.75
0.50
0.25
0
-0.25
-16
-14
-12
-10
-8
INPUT VOLTAGE (V)
GATE-OFF REGULATOR LOAD REGULATION
0
-0.2
-0.4
-0.6
-0.8
-1.0
0
10
20
30
40
50
LOAD CURRENT (mA)
8 _______________________________________________________________________________________